Two-saw trimmer



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W; F, PARISH.

TWO-SAW TRIMMER.

Patente Aug. 30, 1887.

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TWO-SAW TRIMMER.

No. 369,026. Patented Aug 30,1887.

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IJNITED. STATES PATENT Orrin-n.

WILLIAM F. PARISH, OF MINNEAPOLIS, MINNESOTA.

TWO-SAW TRIMMER.

SPECIFICATION forming part of Letters Patent No. 369.026, dated August30, 1887.

Application filed March 4, 1887. Serial No. 229,604.

To all whom it may concern:

Be it known that I, WILLIAM F. PARISH, of Minneapolis, in the county ofHennepin and Stateof Minnesota, have invented certain new and usefulImprovements in Two-Saw Trimmers, of which the following isaspecification.

This invention relates to improvements in machines for trimming the endsof lumbersuch as boards, planks, dimensions, bill-stuff, or timber-andcutting them off to any desired length. g

The object of my invention is to simplify and improve the constructionof machines of this class, and to provide means by which the saws may bequickly and simultaneously adjusted from either end of the machine.

The invention consists, generally, in the construction and combinationhereinafter described, and pointed outin the claims.

In the accompanying drawings,forming part of this specification, Figurel is a plan of a machine constructed in accordance with my invention.Fig. 2 is a side elevation of the same. Fig. 3 is an end elevation.Figs. 4, 5, 6, 7, 8, and 9 are details. Fig. 10 is a plan showingamodified means for moving the saws. Fig. 11 is a side elevation of thesame.

In the drawings, 2 represents the frame of the machine, which may be ofany suitable size and construction. It is provided with suitablecrossbars, 3, having boxes 5 and 7, located at the front and rear of themachine. The rear of the frame 2 is preferably somewhat higher than thefront, so that the top of the frame slopes from rear to front, as shownin Fig. 3. v

A shaft, 9, is mounted in boxes 5, and extends longitudinally of themachine. This shaftissecured rigidlyinitsbearings. Ashaft, 11, havingaspline or feather thereon, is mounted and turns in the bearings 7 at therear of the machine.

A shaft, 13, at each end of the machine is mounted in bearings in thecrossbars 3, each shaft having one bearing on the cross-bar at the endof the frame and another bearing on one of the central crossbars.

A chain-carrier frame, 15, consisting of a suitable casting having achannel, 16, in its upper surface, and provided'with the halfboxes 17and 18, extends across and rests upon the three shafts 9, 11, and 13.Suitable caps (No model.)

are bolted to the half-boxes and hold the chaincarrier frame upon theshafts. These frames are bifurcated at each end, so as to receivebetween the two parts at each end a sprocketwheel, 19, that is securedupon ahub or sleeve,

20, and journaled in the boxes in the frame.

The shaft 11 passes through this hub, as shown in detail in Fig. 4, andis splined thereto. The

sprocket-wheel is thus free to slide longitudicarrier frame, and isprovided with bearingpins'23, that are adapted to bear upon the oppositefaces of the saw.

The chain-carrier frame is provided at the bottom of thev groove in itsupper surface with a strip of hard wood, 25, which forms a smoothbearing-surface for the chain to move on. This surface does notmaterially wear the chain, and is readily removed and replaced.

Each chain-carrier frame is provided with a sprocket-chain, 27, that isarranged in the groove in its upper surface and passes around thesprocket-wheels in the ends of the frame. This chain is provided withthe carrying-lugs 29, that project above the carrier-frame as they passalong in the groove inits top, as shown in Fig. 3.

It will be seen that with this construction the chain-carrier frame, thesprocket-wheels,

chains, saws, and saw-guides are all adapted to be moved togetherlongitudinally on the shafts 9, 11, and 13, and that by means of thespline-shafts the saws and the chains may be driven continuously.

The means that I prefer to use for moving the chain-carrier frames andthe parts carried by or connected with them is as follows: A transverseshaft, 33, isjournaled in bearings at each end of the frame of themachine, and each shaft is provided with a crank, 35, and with twospirally-grooved pulleys, 37, located near the ends of the shaft. A wirerope or cable, 39, passes over eachpulley and extends substantially thefull length of the machine, as shown in Figs. 1 and 2. Each movablechain carrier has a downwardly-projecting arm, 40, provided withrecesses 41 and caps 42, that may be secured to the arm by bolts 43. Theupper strand of each cable is passed through the upper recesses of onecarrier and is clamped thereto by the cap-plates 42, while the lowerstrand passes freely through the lower recess. The lower strand of eachea ble is secured to the arm of the other chaincarrier frame by beingpassed through the other recess and under the other cap, 42, and theupper strand passes loosely through the upper recess, 41. Each cable ispreferably secured to one of the carrier-frames by means of a threadedbolt and nut, 45 and 47, (see Fig. 8,)by means of which the slack in therope may be taken up. One of the pulleys, 37, is provided with fourholes or notches, 48, in its side, and a spring, 49, is secured upon theframe and arranged to bear upon the face of the pulley. As the shaft isturned, the point of the spring drops into these holes. The spring willhold the shaft and keep it from accidentally turning, but can be drawnout when power is applied to the crank-arm.

To separate the saws or draw them together, power is applied to one ofthe shafts through the crank-arm. The chain-carrier frames, and withthem the chains and the saws, are thereby simultaneously moved inopposite directions, so as to separate the saws or bring them nearertogether. The pulleys are preferably of such diameter that a fullrevolution of the shaft 33 moves each saw two feet,thereby lessening orincreasing the distance between them four feet. A half revolution moveseach saw one foot, and a quarter-revolution moves each saw six inches.When the attendant is turning the crank on the shaft 33, he will hearand feel the spring 49 as it drops into each of the holes 48, and hewill thus be enabled to determine exactly the distance that the sawshave moved.

A stationary chain-carrier frame, 50, is preferably arranged between thetwo movable frames, as shown in Figs. 1 and 2, and has a chain similarto that on the other frames and operated by sprocketwheels in a similarmanner for the purpose of aiding in moving the material to the saws. Astationary saw may be mounted midway between the other saws, ifpreferred, for the purpose of cutting the lumber in the center. Each ofthe shafts 13 may be provided with a driving-pulley, 51, through whichpower may be applied to drive the saws. The sprockets for moving thechains may be driven by any suitable means.

I have shown a shaft, 52, journaled in bearings in the frame of themachine and provided with a drivingpulley, 53, and a frictionpulley, 54.Ashaft,55,is also journaledin bear ings in the frame, and is providedwith a ragwheel, 56, that is driven by the friction-pulley 54. The shaftis also provided with a sprocket-wheel, 57, and a chain, 58, extendsaround this wheel and around a sprocketwheel, 59, on the shaft 11. Powerbeing applied to the pulley 53, and through this pulley and themechanism shown to the shaft 11, the chains are thereby driven, andthelumber that is moved onto the top of the frame is thereby carried tothe saws.

The saws may be quickly and accurately adjusted to trim or cut thelumber to any desired lengths, and this adjustment maybe made fromeither end of the machine. Any suitable drive may be used for the shaft11.

In Figs. 10 and 11 I have shown the sawshafts 13 coupled together andadapted to be driven by a single pulley. I have also in these figuresshown the movable chain-carriers as separately adjustable, each beingprovided with a lever, 60, and the shaft 9 being provided with notchesupon its upper surface, with any one of which the lever is adapted toengage. By grasping the lever and first raising it from the notch in theshaft 9,with which it is in engagement, the carrier-frame, and with itthe saw and chain, can be moved to any desired point. The lever beingallowed to engage another of the notches, the framewill be held in thatposition until the lever again raised. By means of these notches theattendant can determine accurately the distance which each saw is moved.

In Figs. 10 and 11 I have shown no means for driving the shaft 11. Thesame device that is shown in the other figures may be used 5 or, ifpreferred, a different feed device may be employed. 1 i i 1 claim as myinvention 1. The combination, in a machine of the class described,withthe shafts 9, 11, and 13, of the carrier frame mounted 011 said shafts,and having a chain-receiving groove in its top and a wooden coveringover thcbottomof said groove, and the carrier-chain arranged asdescribed on said frame, for the purpose set forth.

2. The combination, in amachine of the class described, with the movablecarrier-frames and the saws connected with said frames, of the shafts33, arranged at the ends of the machine and provided with pulleys 37,and the cables passing over said pulleys, and each having one strandconnected to one of said frames and the other strand connected to theother of said frames,whereby said frames may be moved simultaneously inopposite directions by operating either of said shafts 33, substantiallyas described.

3. The combination, in a machine of the class described, with themovable saws, of the carrierframes having the depending arms 40,provided with recesses 41 and caps 42, and the cables 39, passing freelythrough one of said recesses and clamped in the other, substantially asdescribed.

4. The combination, in amachine of the class described, with the movablecarrier-frames and saws, of the shafts 33 at each end of the machine,the pulleys 37 upon said shafts, one of said pulleys being provided withrecesses 48,

the cables 39, arranged upon said pulleys, and each having one strandsecured to one of said frames and the other strand secured to the otherframe, and a spring, 49, adapted to engage in said recesses 48 on one ofsaid pulleys,whereby said frames may be moved simultaneously in eitherdirection by turning either of said shafts, and may be held in anydesired position.

In testimony whereof I have hereunto set my hand this 24th day ofFebruary, 1887.

R. H. SANFORD, A. 0 PAUL.

